Samsung 8-GB (8 Gigabyte) Micro SDHC Flash Card Standard Micro SD Memory Card Compatible with AT&T HTC Vivid Cell Phones. Samsung says it has developed the world's largest microSD memory card. At 8GB, the fingernail-sized card can store 2,000 MP3 files, 4,000 digital photos or around five DVD-quality movies. With a read speed of 16 MB/s and a write speed of 6MB/s, the 8GB memory card is one-and-a-half times faster than the Speed Class 4 SDHC standard. Jump for more.Not all devices support microSDHC 8GB cards. Please contact your device manufacturer for details. To ensure compatibility, look for the microSDHC logo on the product or packaging of your new phone or PDA.The new microSDHC 8GB card, has a suggested price of $58.00 (MSRP U.S.).